Need Assistance?
Legendary Service... Ask Your Friends - Since 1969
800.969.7501
Over 160K Powersport Items - In-Stock and ready to ship today! View tires, apparel, helmets, exhaust and more!

HJC Silver/Black AC-X3 Agent Helmet - 624-851

  • Part #:
    3301473XS
  • Manufacturer Part #:
    624-851
This item is no longer available

Overview of HJC Silver/Black AC-X3 Agent Helmet - 624-851

  • Snell M2005 and DOT certified
  • Carbon and Titan helmets use the most technologically advanced carbon fiber materials for strength, durability and light weight
  • Agent, Option and Solid helmets feature super lightweight shell design using advanced fiberglass and Spectra® composite weave
  • Flow-through advanced channeling ventilation system with dual flow-through channels, two high-capacity forehead intake vents and two venturi exhaust vents
  • Removable Aqua Trans® open-cell interior liner quickly wicks moisture away from skin
  • Open cell technology foam allows for increased internal air circulation
  • Three shell sizes for a more comfortable fit
  • I-beam chin bar and padded chin strap
  • Aerodynamic visor design features an adjustable three-screw "ram-air" visor
  • Integrated visor fins to reduce high-speed lift
  • Large eye port opening for greater visibility
  • Integrated non-slip goggle strap holders on each side of eye port
  • Ear cavities to accommodate speakers
  • Double D-ring retention strap with nylon retention band and snap that neatly secures excess chin strap
  • Medium helmet weighs 3 lb. 11 oz.

Specs for HJC Silver/Black AC-X3 Agent Helmet - 624-851

Age Adult
Color Black
Color White
Color Flat Silver
Color - Primary Silver
Helmet Style MX Style
Safety Rating DOT
Safety Rating Snell M2005
Size X-Small
Units Each
Weight 5.25 lbs

Specs for HJC Silver/Black AC-X3 Agent Helmet - 624-851

Age Adult
Color Black
Color White
Color Flat Silver
Color - Primary Silver
Helmet Style MX Style
Safety Rating DOT
Safety Rating Snell M2005
Size X-Small
Units Each
Weight 5.25 lbs

HJC Sizing Information

How to size
HJC - all except RPHA/FG-17/FG-JET/CL-17
INCHES CM HAT SIZE
XX-SMALL 20 - 20 1/2 51-52 6 3/8 - 6 1/2
X-SMALL 20 7/8 - 21 1/4 53-54 6 5/8 - 6 3/4
SMALL 21 5/8 - 22 55-56 6 7/8 - 7
MEDIUM 22 1/2 - 22 3/4 57-58 7 1/8 - 7 1/4
LARGE 23 1/4 - 23 5/8 59-60 7 3/8 - 7 1/2
X-LARGE 24 - 24 3/8 61-62 7 5/8 - 7 3/4
XX-LARGE 24 3/4 - 25 1/4 63-64 7 7/8 - 8
XXX-LARGE 25 5/8 - 26 65-66 8 1/8 - 8 1/4
XXXX-LARGE 26-1/4 - 26 5/8 67-68 8 3/8 - 8 1/2
XXXXX-LARGE 27 1/4 - 27 5/8 69-70 8 5/8 - 8 3/4
HJC CL-17/ IS-17 REPLACEMENT/OPTIONAL CHEEK PADS
HELMET SIZE STD. Cheek Pad THICKNESS
XS 40MM
S 35MM
M 30MM
L 35MM
XL 30MM
XXL 25MM
XXXL 25MM
XXXXL 20MM
XXXXXL 17MM
HJC CL-17/ IS-17 REPLACEMENT/OPTIONAL HELMET LINER
HELMET SIZE SHELL SIZE/EPS SIZE STD. LINER SIZE- THICKNESS COMPATIBLE LINER SIZE
XS M/M XS - 18MM XS/S/M
S M/M S - 15MM XS/S/M
M M/M M - 12MM XS/S/M
L L/L L - 18MM L/XL/XXL
XL L/L XL - 15MM L/XL/XXL
XXL L/L XXL - 12MM L/XL/XXL
XXXL L/XXXL XXXL - 15MM XXXL
XXXXL L/XXXL XXXXL - 12MM XXXL
XXXXXL L/XXXL XXXXXL - 9MM XXXL
CL-17/CL-17 PLUS HELMET
INCHES CM HAT SIZE
X-SMALL 21 1/4 - 21 5/8 54-55 6 3/4 - 6 7/8
SMALL 22 - 22 1/2 56-57 7 - 7 1/8
MEDIUM 22 7/8 - 23 1/4 58-59 7 1/4 - 7 3/8
LARGE 23 5/8 - 24 60-61 7 1/2 - 7 5/8
X-LARGE 24 3/8 - 24 3/4 62-63 7 3/4 - 7 7/8
XX-LARGE 25 1/4 - 25 5/8 63-64 7 7/8 - 8
XXX-LARGE 25 5/8 - 26 65-66 8 1/8 - 8 1/4
XXXX-LARGE 26 3/8 - 26 3/4 67-68 8 3/8 - 8 1/2
XXXXX-LARGE 27 1/4 - 27 5/8 69-70 8 5/8 - 8 3/4
HJC CL-X7 REPLACEMENT/OPTIONAL CHEEK PADS/HELMET LINER
HELMET SIZE SHELL SIZE/EPS SIZE STD. CHEEK PAD THICKNESS STD. LINER SIZE- THICKNESS COMPATIBLE LINER SIZES
XS M/M 35MM XS - 12MM S - 9MM OR M - 9MM
S M/M 30MM S - 9MM XS - 12MM OR M - 9MM
M M/M 25MM M - 9MM XS - 12MM OR S - 9MM
L L/L 35MM L - 15MM XL - 12MM OR XXL - 9MM
XL L/L 30MM XXL - 12MM L - 15MM OR XXL - 9MM
XXL L/L 25MM XXL - 9MM L - 15MM OR XL - 12MM
XXXL L/XXXL 20MM XXXL - 12MM XXXXL - 9MM/XXXXXL - 7MM
XXXXL L/XXXL 17MM XXXXL - 9MM XXXL - 12MM OR XXXXXL - 7MM
XXXXXL L/XXXL 14MM XXXXXL - 7MM XXXL - 12MM OR XXXXL - 9MM
HJC FG-X REPLACEMENT/OPTIONAL CHEEK PADS
HELMET SIZE STD. Cheek Pad THICKNESS
XS 42MM
S 37MM
M 32MM
L 37MM
XL 32MM
XXL 25MM
HJC FG-X REPLACEMENT/OPTIONAL HELMET LINER
HELMET SIZE SHELL SIZE/EPS SIZE STD. LINER SIZE- THICKNESS COMPATIBLE LINER SIZES
XS M/M XS - 15MM S - 12MM OR M - 9MM
S M/M S - 12MM XS - 15MM OR M - 9MM
M M/M M - 9MM XS - 15MM OR S - 12MM
L L/L L - 15MM XL - 12MM OR XXL - 9MM
XL L/L XL - 12MM L - 15MM OR XXL - 9MM
XXL L/L XXL - 9MM L - 15MM OR XL - 12MM
HJC RPHA SERIES/FG-17/FG-JET SERIES
SIZE INCHES CM HAT SIZE
X-SMALL 21 1/4 - 21 5/8 54-55 6 3/4 - 6 7/8
SMALL 21 5/8 - 22 55-56 6 7/8 - 7
MEDIUM 22 1/2 - 22 7/8 57-58 7 1/8 - 7 1/4
LARGE 22 7/8 - 23 1/4 58-59 7 1/4 - 7 3/8
X-LARGE 23 5/8 - 24 60-61 7 1/2 - 7 5/8
XX-LARGE 24 3/8 - 24 3/4 62-63 7 3/4 - 7 7/8
XXX-LARGE 25 1/4 - 25 5/8 64-65 8 - 8 1/8
HJC YOUTH S/M, LXL SIZE CHART
SIZE INCHES CM HAT SIZE
SMALL/MEDIUM 19 1/4 - 19 3/4 49-50 6 1/8 - 6 1/4
LARGE/X-LARGE 20 - 20 1/2 51-52 6 3/8 - 6 1/2
HJC YOUTH HELMET S-M-L SIZING
SIZE INCHES CM HAT SIZE
SMALL 19 1/4 - 19 3/4 49-50 6 1/8 - 6 1/4
MEDIUM 20 - 20 1/2 51-52 6 3/8 - 6 1/2
LARGE 20 7/8 - 21 1/4 53-54 6 5/8 - 6 3/4

Fitment for HJC Silver/Black AC-X3 Agent Helmet - 624-851

See if this part fits your ride

Part 3301473XS fits the following machines

There are no reviews for this item. Write Review
Start typing your question and we'll check if it was already asked and answered. Learn More
No questions have been asked about this item. Be the first!

Instructions and Manuals for HJC Silver/Black AC-X3 Agent Helmet - 624-851